package com.tudouji.common.utils.http;

import java.io.*;
import java.net.*;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.X509Certificate;
import java.util.*;
import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.http.NameValuePair;
import org.apache.http.client.utils.URLEncodedUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.tudouji.common.constant.Constants;
/**
 * 通用http发送方法
 * 
 * @author ruoyi
 */
@Slf4j
public class HttpUtils
{

    /**
     * 向指定 URL 发送GET方法的请求
     *
     * @param url 发送请求的 URL
     * @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     * @return 所代表远程资源的响应结果
     */
    public static String sendGet(String url, String param)
    {
        return sendGet(url, param, Constants.UTF8, null);
    }
    public static String sendGet(String url, String param, HashMap<String, String> heads)
    {
        return sendGet(url, param, Constants.UTF8, heads);
    }
    public static String sendGet(String url, String param, String contentType)
    {
        return sendGet(url, param, contentType, null);
    }

    /**
     * 向指定 URL 发送GET方法的请求
     *
     * @param url 发送请求的 URL
     * @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     * @param contentType 编码类型
     * @return 所代表远程资源的响应结果
     */
    public static String sendGet(String url, String param, String contentType, HashMap<String, String> heads)
    {
        StringBuilder result = new StringBuilder();
        BufferedReader in = null;
        try
        {
            URLConnection connection = getUrlConnectionForGet(url, param, heads);
            in = new BufferedReader(new InputStreamReader(connection.getInputStream(), contentType));
            String line;
            while ((line = in.readLine()) != null)
            {
                result.append(line);
            }
            log.info("recv - {}", result);
        }
        catch (ConnectException e)
        {
            log.error("调用HttpUtils.sendGet ConnectException, url=" + url + ",param=" + param, e);
        }
        catch (SocketTimeoutException e)
        {
            log.error("调用HttpUtils.sendGet SocketTimeoutException, url=" + url + ",param=" + param, e);
        }
        catch (IOException e)
        {
            log.error("调用HttpUtils.sendGet IOException, url=" + url + ",param=" + param, e);
        }
        catch (Exception e)
        {
            log.error("调用HttpsUtil.sendGet Exception, url=" + url + ",param=" + param, e);
        }
        finally
        {
            try
            {
                if (in != null)
                {
                    in.close();
                }
            }
            catch (Exception ex)
            {
                log.error("调用in.close Exception, url=" + url + ",param=" + param, ex);
            }
        }
        return result.toString();
    }

    public static URLConnection getUrlConnectionForGet(String url, String param, HashMap<String, String> heads){
        String urlNameString = url;
        if (null != param){
            urlNameString = url + "?" + param;
        }
        log.info("sendGet - {}", urlNameString);
        try{
            URL realUrl = new URL(urlNameString);
            URLConnection connection = realUrl.openConnection();
            connection.setRequestProperty("accept", "*/*");
            connection.setRequestProperty("connection", "Keep-Alive");
            connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            if (null != heads){
                Set<Map.Entry<String, String>> set = heads.entrySet();
                Iterator<Map.Entry<String, String>> iterator = set.iterator();
                if (iterator.hasNext()){
                    Map.Entry<String, String> item = iterator.next();
                    connection.setRequestProperty(item.getKey(), item.getValue());
                }
            }
            connection.connect();
            return connection;
        }catch (Exception e){
            e.printStackTrace();
            return null;
        }
    }

    /**
     * 向指定 URL 发送POST方法的请求
     *
     * @param url 发送请求的 URL
     * @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     * @return 所代表远程资源的响应结果
     */
    public static String sendPost(String url, String param)
    {
        PrintWriter out = null;
        BufferedReader in = null;
        StringBuilder result = new StringBuilder();
        try
        {
            String urlNameString = url;
            log.info("sendPost - {}", urlNameString);
            URL realUrl = new URL(urlNameString);
            URLConnection conn = realUrl.openConnection();
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            conn.setRequestProperty("Accept-Charset", "utf-8");
            conn.setRequestProperty("contentType", "utf-8");
            conn.setDoOutput(true);
            conn.setDoInput(true);
            out = new PrintWriter(conn.getOutputStream());
            out.print(param);
            out.flush();
            in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "utf-8"));
            String line;
            while ((line = in.readLine()) != null)
            {
                result.append(line);
            }
            log.info("recv - {}", result);
        }
        catch (ConnectException e)
        {
            log.error("调用HttpUtils.sendPost ConnectException, url=" + url + ",param=" + param, e);
        }
        catch (SocketTimeoutException e)
        {
            log.error("调用HttpUtils.sendPost SocketTimeoutException, url=" + url + ",param=" + param, e);
        }
        catch (IOException e)
        {
            log.error("调用HttpUtils.sendPost IOException, url=" + url + ",param=" + param, e);
        }
        catch (Exception e)
        {
            log.error("调用HttpsUtil.sendPost Exception, url=" + url + ",param=" + param, e);
        }
        finally
        {
            try
            {
                if (out != null)
                {
                    out.close();
                }
                if (in != null)
                {
                    in.close();
                }
            }
            catch (IOException ex)
            {
                log.error("调用in.close Exception, url=" + url + ",param=" + param, ex);
            }
        }
        return result.toString();
    }

    public static String sendSSLPost(String url, String param)
    {
        StringBuilder result = new StringBuilder();
        String urlNameString = url + "?" + param;
        try
        {
            log.info("sendSSLPost - {}", urlNameString);
            SSLContext sc = SSLContext.getInstance("SSL");
            sc.init(null, new TrustManager[] { new TrustAnyTrustManager() }, new java.security.SecureRandom());
            URL console = new URL(urlNameString);
            HttpsURLConnection conn = (HttpsURLConnection) console.openConnection();
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            conn.setRequestProperty("Accept-Charset", "utf-8");
            conn.setRequestProperty("contentType", "utf-8");
            conn.setDoOutput(true);
            conn.setDoInput(true);

            conn.setSSLSocketFactory(sc.getSocketFactory());
            conn.setHostnameVerifier(new TrustAnyHostnameVerifier());
            conn.connect();
            InputStream is = conn.getInputStream();
            BufferedReader br = new BufferedReader(new InputStreamReader(is));
            String ret = "";
            while ((ret = br.readLine()) != null)
            {
                if (ret != null && !"".equals(ret.trim()))
                {
                    result.append(new String(ret.getBytes("ISO-8859-1"), "utf-8"));
                }
            }
            log.info("recv - {}", result);
            conn.disconnect();
            br.close();
        }
        catch (ConnectException e)
        {
            log.error("调用HttpUtils.sendSSLPost ConnectException, url=" + url + ",param=" + param, e);
        }
        catch (SocketTimeoutException e)
        {
            log.error("调用HttpUtils.sendSSLPost SocketTimeoutException, url=" + url + ",param=" + param, e);
        }
        catch (IOException e)
        {
            log.error("调用HttpUtils.sendSSLPost IOException, url=" + url + ",param=" + param, e);
        }
        catch (Exception e)
        {
            log.error("调用HttpsUtil.sendSSLPost Exception, url=" + url + ",param=" + param, e);
        }
        return result.toString();
    }

    private static class TrustAnyTrustManager implements X509TrustManager
    {
        @Override
        public void checkClientTrusted(X509Certificate[] chain, String authType)
        {
        }

        @Override
        public void checkServerTrusted(X509Certificate[] chain, String authType)
        {
        }

        @Override
        public X509Certificate[] getAcceptedIssuers()
        {
            return new X509Certificate[] {};
        }
    }

    private static class TrustAnyHostnameVerifier implements HostnameVerifier
    {
        @Override
        public boolean verify(String hostname, SSLSession session)
        {
            return true;
        }
    }


    /**
     *  发送post 数据
     * @param urls
     * @return
     */
    public static String sendPost(String urls, String param, String contentType, String method) {
        StringBuffer sb=new StringBuffer();
        DataOutputStream out = null;
        BufferedReader responseReader = null;
        InputStream in1 = null;
        try {
            trustAllHosts();
            // 创建url资源
            URL url = new URL(urls);
            // 建立http连接
            HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
            conn.setHostnameVerifier(DO_NOT_VERIFY);
            // 设置不用缓存
            conn.setUseCaches(false);
            // 设置允许输出
            conn.setDoOutput(true);
            // 设置允许输入
            conn.setDoInput(true);
            // 设置传递方式
            conn.setRequestMethod(method);
            System.out.println(conn.getRequestMethod());
            // 设置维持长连接
            conn.setRequestProperty("Connection", "Keep-Alive");
            // 设置文件字符集:
            conn.setRequestProperty("Charset", "UTF-8");
            // 转换为字节数组
//            byte[] data = (param).getBytes();
//            // 设置文件长度
//            conn.setRequestProperty("Content-Length", String.valueOf(data.length));
            // 设置文件类型:
            conn.setRequestProperty("Content-Type", contentType);
            // 开始连接请求
            conn.connect();
            out = new DataOutputStream(conn.getOutputStream());
            // 写入请求的字符串
            out.writeBytes(param);
            out.flush();

            System.out.println(conn.getResponseCode());

            // 请求返回的状态
            if (HttpURLConnection.HTTP_OK == conn.getResponseCode()) {
                System.out.println("连接成功");
                // 请求返回的数据
                in1 = conn.getInputStream();
                String readLine;
                responseReader = new BufferedReader(new InputStreamReader(in1,"UTF-8"));
                while((readLine=responseReader.readLine()) != null){
                    sb.append(readLine).append("\n");
                }
            } else {
                System.out.println("error++");
            }
        } catch (Exception e) {

        } finally {
            try {
                if (null != responseReader)
                    responseReader.close();
                if (null != in1)
                    in1.close();
            } catch(Exception e) {}
            try {
                out.close();
            } catch(Exception e) {}
        }

        return sb.toString();

    }
    //添加主机名验证程序类，设置不验证主机
    private final static HostnameVerifier DO_NOT_VERIFY = new HostnameVerifier() {
        public boolean verify(String hostname, SSLSession session) {
            return true;
        }
    };

    //添加信任主机
    private static void trustAllHosts() {
        // 创建不验证证书链的信任管理器 这里使用的是x509证书
        TrustManager[] trustAllCerts = new TrustManager[]{new X509TrustManager() {
            public java.security.cert.X509Certificate[] getAcceptedIssuers() {
                return new java.security.cert.X509Certificate[]{};
            }

            public void checkClientTrusted(X509Certificate[] chain, String authType) {
            }

            public void checkServerTrusted(X509Certificate[] chain, String authType) {
            }
        }};
        // 安装所有信任的信任管理器
        try {
            SSLContext sc = SSLContext.getInstance("TLS");
            sc.init(null, trustAllCerts, new java.security.SecureRandom());
            //HttpsURLConnection通过SSLSocket来建立与HTTPS的安全连接，SSLSocket对象是由SSLSocketFactory生成的。
            HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * map转url参数
     */
    public static String map2Url(Map<String, String> paramToMap) {
        if (null == paramToMap || paramToMap.isEmpty()) {
            return null;
        }
        StringBuffer url  = new StringBuffer();
        boolean      isfist = true;
        for (Map.Entry<String, String> entry : paramToMap.entrySet()) {
            if (isfist) {
                isfist = false;
            } else {
                url.append("&");
            }
            url.append(entry.getKey()).append("=");
            String value = entry.getValue();
            if (!StringUtils.isEmpty(value)) {
                try {
                    url.append(URLEncoder.encode(value, "UTF-8"));
                } catch (UnsupportedEncodingException e) {
                    e.printStackTrace();
                }
            }
        }
        return url.toString();
    }
}